CVE-2026-21284Network attack vector

Session takeover via stored form-field scripts

Published Mar 11, 2026 · Updated Mar 11, 2026

Stored XSS in affected Adobe Commerce 2.4.x releases allows remote authenticated users with admin privileges to take over browser sessions. Adobe identifies vulnerable form fields but has not disclosed which fields or the code path that stores and later renders their content without neutralizing scripts. An administrator must inject the script, and another user must browse to the affected page; successful execution exposes that victim's session to takeover.

CVSS severity8.1
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in affected Adobe Commerce 2.4.x releases allows remote authenticated users with admin privileges to take over browser sessions. Adobe identifies vulnerable form fields but has not disclosed which fields or the code path that stores and later renders their content without neutralizing scripts. An administrator must inject the script, and another user must browse to the affected page; successful execution exposes that victim's session to takeover.

The record

CVE
CVE-2026-21284
Published
Mar 11, 2026
Updated
Mar 11, 2026
Vendor
Adobe
Product
Adobe Commerce
Classifications
CWE-79, T1189
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.4.4-p16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Adobe · Adobe Commerceversion=0 <=2.4.4-p16

Published CVSS scores

8.1AdobeCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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